I am still working on it and still have not found the relay. It ist definitely not where it is supposed to be. Next week we will take care of it in a garage and go piece by piece. I still do not think, it was at the radiator, because it always sounded way closer in it's "good days". I will have to remove the instrument cluster anyway, because something came loose in there and some bulbs are not working anymore. Maybe, it's hidden there?
There are some FirstGen Firebirds in Germany, but most are Coupes. Some are in a great condition . I prefer to keep my car in a "used", but original condition. It may tell the story to the people, that it had a long and interesting life. ;-)
I will tell you, when I've found the relay and hopefiully the problem as well. I need the working horns for the statutory technical revision called TUV.
